Japanese Mac news blog Macotakara reports that the 18W USB-C power adapter will come bundled with the new iPhone models this year, but due to supply constraints, it will not be sold separately. The production of the power adapter is said to be operating at "full capacity only to make the products" available for the new iPhone models. Nevertheless, Apple could help third-party accessory makers build compatible USB-C chargers in early 2019 by adding its proprietary technology to the MFi programme sometime in late 2018.

Earlier this month, Macotakara leaked the images showing the USB-C adapter in reality. The adapter appeared to be thicker than the existing charger. Further, the presence of the USB-C port was clearly visible in the images. The new adapter, when used with an eligible Lightning cable, is expected to charge a new iPhone from 0 to 50 percent in nearly 30 minutes. This is notably similar to how various fast charging solutions on Android devices work nowadays.

Importantly, Apple does offer fast charging support on its 2017 iPhone family, including iPhone 8, iPhone 8 Plus, and iPhone X. But users currently need to purchase a USB-C to Lightning cable and a USB-C power adapter to experience the advancement. The standard USB Type-A adapter offered by the iPhone maker delivers only 12W of power. This is significantly lesser than the 18W power that has so far been rumoured to be in development for the next-generation iPhone lineup.

Alongside faster-charging experiences, the new iPhone range is expected to support wireless charging and include bigger batteries than their predecessors. It is also rumoured that Apple will enable dual-SIM support to make the handsets more attractive for markets such as China and India.